EP3114371B1 - Method for controlling a hydraulic-medium supply system of an automatic transmission - Google Patents

Method for controlling a hydraulic-medium supply system of an automatic transmission Download PDF

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Publication number
EP3114371B1
EP3114371B1 EP15702796.2A EP15702796A EP3114371B1 EP 3114371 B1 EP3114371 B1 EP 3114371B1 EP 15702796 A EP15702796 A EP 15702796A EP 3114371 B1 EP3114371 B1 EP 3114371B1
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EP
European Patent Office
Prior art keywords
cooling
wheel set
driven
hydraulic pump
vehicle
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EP15702796.2A
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German (de)
French (fr)
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EP3114371A1 (en
Inventor
Karl Locher
Alexander Hoffmann
Rainer Novak
Martin-Joachim Bader
Markus Terwart
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ZF Friedrichshafen AG
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ZF Friedrichshafen AG
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D25/00—Fluid-actuated clutches
    • F16D25/12—Details not specific to one of the before-mentioned types
    • F16D25/123—Details not specific to one of the before-mentioned types in view of cooling and lubrication
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D25/00—Fluid-actuated clutches
    • F16D25/12—Details not specific to one of the before-mentioned types
    • F16D25/14—Fluid pressure control
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/04—Features relating to lubrication or cooling or heating
    • F16H57/0412—Cooling or heating; Control of temperature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/04—Features relating to lubrication or cooling or heating
    • F16H57/0434—Features relating to lubrication or cooling or heating relating to lubrication supply, e.g. pumps ; Pressure control
    • F16H57/0435—Pressure control for supplying lubricant; Circuits or valves therefor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/04—Features relating to lubrication or cooling or heating
    • F16H57/0434—Features relating to lubrication or cooling or heating relating to lubrication supply, e.g. pumps ; Pressure control
    • F16H57/0441—Arrangements of pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/04—Features relating to lubrication or cooling or heating
    • F16H57/0434—Features relating to lubrication or cooling or heating relating to lubrication supply, e.g. pumps ; Pressure control
    • F16H57/0446—Features relating to lubrication or cooling or heating relating to lubrication supply, e.g. pumps ; Pressure control the supply forming part of the transmission control unit, e.g. for automatic transmissions
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/04—Features relating to lubrication or cooling or heating
    • F16H57/0467—Elements of gearings to be lubricated, cooled or heated
    • F16H57/0473—Friction devices, e.g. clutches or brakes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
    • F16H61/0021—Generation or control of line pressure
    • F16H61/0025—Supply of control fluid; Pumps therefore
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
    • F16H61/0021—Generation or control of line pressure
    • F16H2061/0037—Generation or control of line pressure characterised by controlled fluid supply to lubrication circuits of the gearing

Definitions

  • the present invention relates to a method for controlling a hydraulic fluid supply system of an automatic transmission of a vehicle according to the closer defined in the preamble of claim 1.
  • Automatic transmissions require at least one hydraulic fluid supply system for supplying hydraulic fluid to transmission elements, such as shift elements or the like.
  • a hydraulic pump driven on the motor side and a hydraulic pump driven on the driven side or on the wheel set side are usually provided.
  • the proposed hydraulic pumps can be assigned to separate hydraulic fluid household systems or systems, so that the motor-side driven hydraulic pump for system pressure generation and the wheelset side driven hydraulic pump are used for wheelset cooling.
  • the hydraulic pumps operate structurally separate oil households or hydraulic supply circuits and thus can not support each other. It is also known that the hydraulic pumps are associated with a common hydraulic fluid supply circuit.
  • the document DE 10 2009 017 959 A1 discloses a powertrain device with a hydraulic system having two pumps, one pump of which is driven by an internal combustion engine or a hybrid unit and the other pump by a separate electric motor is drivable.
  • the present invention is based on the object, a method for driving a hydraulic fluid supply system of the type described above to propose, which ensures a consumption-optimized control of the hydraulic fluid supply system of the automatic transmission.
  • a method for activating one or more hydraulic fluid supply systems of an automatic transmission, in particular a dual-clutch transmission, of a vehicle wherein the hydraulic fluid supply system is supplied with hydraulic fluid from at least one hydraulic pump driven by the engine and from a hydraulic pump driven by the wheel set.
  • a cooling valve of the hydraulic fluid supply system for supplying oil or hydraulic fluid is actuated as a function of detected vehicle parameters or the like for setting an adapted consumption-optimized power distribution in the hydraulic pumps.
  • the respective operating mode of the vehicle is first determined and depending on the detected operating mode, a suitable control of the hydraulic pumps via the cooling valve is realized, thereby making a consumption-optimized power distribution in the hydraulic pumps for the hydraulic fluid supply.
  • the vehicle parameters can be detected by the electronic transmission control and evaluated accordingly in order to recognize the operating modes stored as models.
  • the cooling valve is controlled according to the predetermined operating modes and thus assumes different switching positions.
  • the vehicle In the first operating mode, for example, the vehicle is in the non-sailing driving state, ie the sailing function is deactivated. In the context of the first operating mode, the vehicle may be in a sailing state even when driving slowly with additional engine start request.
  • a second operating mode is z. B. the activated sail function with engine running at low speeds.
  • the vehicle is in a sailing condition without engine running. It is also possible that the vehicle is in the sailing mode in the third operating mode with engine running. Finally, the vehicle is in the fourth operating mode z. B. at high speed in non-sailing driving condition.
  • Other operating modes can also be detected by the method according to the invention.
  • FIG. 1 schematically a hydraulic fluid supply system for an automatic transmission, in particular a dual-clutch transmission, a vehicle exemplified.
  • the hydraulic fluid supply system comprises a hydraulic fluid circuit which is provided for cooling and actuating and lubricating transmission elements of the automatic transmission.
  • the hydraulic fluid circuit is supplied via a drive-side driven hydraulic pump FZP-Pu and a wheel set side driven hydraulic pump RS-Pu with hydraulic fluid or oil.
  • the hydraulic fluid circuit is connected to a return to the oil cooler and hydraulic sump.
  • a cooling valve is also arranged, with which the flow rates can be regulated.
  • the cooling valve is controlled by an electric pressure actuator EDS.
  • a map with corresponding models or a matrix with different operating modes can be stored.
  • the volume flow generation or volume flow distribution can be varied by the predetermined operating modes.
  • the operating modes are variable due to the incoming parameters related to volumetric flow generation and distribution. This means that, for example, in the case of a strong transmission oil temperature rise, the volume flow in the currently preset operating mode can be changed as a function of temperature and thus the total volume flow for reducing the transmission oil temperature is increased.
  • the driving state in the non-sailing state is detected as the first operating mode BM1, wherein alternatively the first operating mode BM1 is the state in which the vehicle is at low speeds with additional engine start request in the sailing driving state.
  • the driving state can be detected, in which the vehicle is under engine running at low speeds in the sailing mode.
  • the driving condition can be detected, in which the vehicle is in a sailing driving condition without engine running.
  • the third operating mode BM3 it is also possible to detect the condition in which the vehicle is in a sailing condition with engine running.
  • the fourth operating mode BM4 the state in which the vehicle is in non-sailing state with high-speed travel can be detected.
  • other operating modes BM5 etc. are also detectable by the method.
  • the respective operating modes BM1, BM2, BM3, BM4 are assigned corresponding control models for the cooling valve, wherein the corresponding control takes place via the electric pressure regulator EDS.
  • corresponding switching positions are set in the cooling valve, so that the hydraulic medium supply is ensured, for example, for the supply of the double clutch DWC, for Radsatzkühlung and lubrication or the like, with excess Hydraulic means the return, so the cooler or the sump is assigned.
  • both a motor-driven hydraulic pump or vane pump FZP-Pu and a wheel set side driven hydraulic pump RS-Pu are assigned.
  • the electronic transmission control EGS for example, the launch control, the vehicle speed V FZG , the transmission oil temperature, the respective driving program, the longitudinal vehicle acceleration a_laengs, the engine torque, special driving situations such. B. start-stop operation and increased slip mode, or the like.
  • FIG. 2 is a corresponding flowchart of the proposed method and the proposed procedure exemplified.
  • the conditions for the existence of a corresponding operating mode BM1, BM2, BM3, BM4 are determined from the detected vehicle parameters.
  • the wheelset cooling is performed predominantly via the wheel set driven hydraulic pump RS-Pu.
  • the clutch and double clutch cooling and the generation of the system pressure for actuating the switching elements are performed by means of the motor-side driven hydraulic pump FZP-Pu.
  • the wheel set side driven hydraulic pump RS-Pu is supported for cooling the wheelset in appropriate driving situations, such as during the so-called race start or slow driving of the vehicle by the motor-driven hydraulic pump FZP-Pu.
  • the wheel set pump or the wheel set side driven hydraulic pump RS-Pu can be switched depending on the driving situation, for example with less need, for clutch cooling become. As a result, the delivery rate of the vane pump or the motor-side driven hydraulic pump FZP-Pu can be reduced to a minimum.
  • the oil return is performed in addition to the oil cooler via the suction charging, which results in a prevention or reduction of the foaming of the oil advantageously with a high cooling demand.

Description

Die vorliegende Erfindung betrifft ein Verfahren zum Ansteuern eines Hydraulikmittelversorgungssystems eines Automatikgetriebes eines Fahrzeuges gemäß der im Oberbegriff des Patentanspruches 1 näher definierten Art.The present invention relates to a method for controlling a hydraulic fluid supply system of an automatic transmission of a vehicle according to the closer defined in the preamble of claim 1. Art.

Automatikgetriebe benötigen zumindest ein Hydraulikmittelversorgungssystem zur Hydraulikmittelversorgung von Getriebeelementen, wie zum Beispiel Schaltelemente oder dergleichen. Zur Hydraulikmittelversorgung des Systems sind üblicherweise eine motorseitig angetriebene Hydraulikpumpe und eine getriebeabtriebsseitige bzw. radsatzseitig angetriebene Hydraulikpumpe vorgesehen. Die vorgesehenen Hydraulikpumpen können getrennten Hydraulikmittelhaushalten bzw. Systemen zugeordnet sein, so dass die motorseitig angetriebene Hydraulikpumpe zur Systemdruckerzeugung und die radsatzseitig angetriebene Hydraulikpumpe zur Radsatzkühlung verwendet werden. Somit bedienen die Hydraulikpumpen baulich getrennte Ölhaushalte bzw. Hydraulikmittelversorgungskreise und können somit sich nicht gegenseitig unterstützen. Es ist auch bekannt, dass die Hydraulikpumpen einem gemeinsamen Hydraulikmittelversorgungskreis zugeordnet sind.Automatic transmissions require at least one hydraulic fluid supply system for supplying hydraulic fluid to transmission elements, such as shift elements or the like. To supply hydraulic fluid to the system, a hydraulic pump driven on the motor side and a hydraulic pump driven on the driven side or on the wheel set side are usually provided. The proposed hydraulic pumps can be assigned to separate hydraulic fluid household systems or systems, so that the motor-side driven hydraulic pump for system pressure generation and the wheelset side driven hydraulic pump are used for wheelset cooling. Thus, the hydraulic pumps operate structurally separate oil households or hydraulic supply circuits and thus can not support each other. It is also known that the hydraulic pumps are associated with a common hydraulic fluid supply circuit.

Es hat sich in nachteiliger Weise gezeigt, dass eine derartige Hydraulikmittelversorgung bei bestimmten Betriebsmodi des Fahrzeuges zum Beispiel keinen Systemdruck zum Betätigen von Schaltelementen zur Verfügung stellt, so dass z. B. eine Gangnachführung oder eine Kupplungsbefüllung aufgrund fehlendem Systemdruck während vorbestimmter Betriebsmodi nicht möglich ist.It has been found disadvantageously that such a hydraulic fluid supply does not provide system pressure for actuating switching elements in certain operating modes of the vehicle, for example, so that, for example, B. a gear tracking or a clutch filling due to lack of system pressure during predetermined operating modes is not possible.

Das Dokument DE 10 2009 017 959 A1 offenbart eine Antriebsstrangvorrichtung mit einem Hydrauliksystem, welches zwei Pumpen aufweist, von denen eine Pumpe von einer Verbrennungskraftmaschine oder einer Hybrideinheit angetrieben wird und die andere Pumpe von einem separaten elektrischen Motor antreibbar ist.The document DE 10 2009 017 959 A1 discloses a powertrain device with a hydraulic system having two pumps, one pump of which is driven by an internal combustion engine or a hybrid unit and the other pump by a separate electric motor is drivable.

Der vorliegenden Erfindung liegt die Aufgabe zu Grunde, ein Verfahren zum Ansteuern eines Hydraulikmittelversorgungssystems der eingangs beschriebenen Gattung vorzuschlagen, welches eine verbrauchsoptimierte Ansteuerung des Hydraulikmittelversorgungssystems des Automatikgetriebes gewährleistet.The present invention is based on the object, a method for driving a hydraulic fluid supply system of the type described above to propose, which ensures a consumption-optimized control of the hydraulic fluid supply system of the automatic transmission.

Diese Aufgabe wird erfindungsgemäß durch die Merkmale des Patentanspruches 1 gelöst, wobei sich vorteilhafte Weiterbildungen aus den Unteransprüchen, der Beschreibung und den Zeichnungen ergeben.This object is achieved by the features of claim 1, wherein advantageous developments of the dependent claims, the description and the drawings.

Es wird ein Verfahren zum Ansteuern eines oder mehrerer Hydraulikmittelversorgungssysteme eines Automatikgetriebes, insbesondere eines Doppelkupplungsgetriebes, eines Fahrzeuges vorgeschlagen, wobei das Hydraulikmittelversorgungssystem zumindest von einer motorseitig angetriebenen Hydraulikpumpe und von einer radsatzseitig angetriebenen Hydraulikpumpe mit Hydraulikmittel versorgt wird. Ein Kühlventil des Hydraulikmittelversorgungssystems zur Öl- bzw. Hydraulikmittelversorgung wird in Abhängigkeit von erfassten Fahrzeugparametern oder dergleichen zum Einstellen einer angepassten verbrauchsoptimierten Leistungsverteilung bei den Hydraulikpumpen angesteuert.A method is proposed for activating one or more hydraulic fluid supply systems of an automatic transmission, in particular a dual-clutch transmission, of a vehicle, wherein the hydraulic fluid supply system is supplied with hydraulic fluid from at least one hydraulic pump driven by the engine and from a hydraulic pump driven by the wheel set. A cooling valve of the hydraulic fluid supply system for supplying oil or hydraulic fluid is actuated as a function of detected vehicle parameters or the like for setting an adapted consumption-optimized power distribution in the hydraulic pumps.

Demzufolge wird zunächst der jeweilige Betriebsmodus des Fahrzeuges ermittelt und in Abhängigkeit des erfassten Betriebsmodus wird eine geeignete Ansteuerung der Hydraulikpumpen über das Kühlventil realisiert, um dadurch eine verbrauchsoptimierte Leistungsverteilung bei den Hydraulikpumpen für die Hydraulikmittelversorgung vorzunehmen. Beispielsweise können die Fahrzeugparameter von der elektronischen Getriebesteuerung erfasst und entsprechend ausgewertet werden, um die als Modelle hinterlegten Betriebsmodi zu erkennen. Das Kühlventil wird entsprechend der vorgegebenen Betriebsmodi angesteuert und nimmt somit unterschiedliche Schaltpositionen ein.Accordingly, the respective operating mode of the vehicle is first determined and depending on the detected operating mode, a suitable control of the hydraulic pumps via the cooling valve is realized, thereby making a consumption-optimized power distribution in the hydraulic pumps for the hydraulic fluid supply. For example, the vehicle parameters can be detected by the electronic transmission control and evaluated accordingly in order to recognize the operating modes stored as models. The cooling valve is controlled according to the predetermined operating modes and thus assumes different switching positions.

Beispielsweise können bei dem vorgeschlagenen Verfahren verschiedene Betriebsmodi erfasst werden. Beim ersten Betriebsmodus befindet sich das Fahrzeug zum Beispiel im nicht segelnden Fahrzustand, d.h. die Segelfunktion ist deaktiviert. Im Rahmen des ersten Betriebsmodus kann sich das Fahrzeug auch bei langsamer Fahrt mit zusätzlicher Motorstartanforderung im segelnden Fahrzustand befinden.For example, different modes of operation may be detected in the proposed method. In the first operating mode, for example, the vehicle is in the non-sailing driving state, ie the sailing function is deactivated. In the context of the first operating mode, the vehicle may be in a sailing state even when driving slowly with additional engine start request.

Ein zweiter Betriebsmodus ist z. B. die aktivierte Segelfunktion mit Motorlauf bei langsamer Fahrt. Im Rahmen eines dritten Betriebsmodus befindet sich das Fahrzeug ohne Motorlauf im segelnden Fahrzustand. Es ist auch möglich, dass sich das Fahrzeug im dritten Betriebsmodus mit Motorlauf im segelnden Fahrzustand befindet. Schließlich befindet sich das Fahrzeug im vierten Betriebsmodus z. B. bei Hochgeschwindigkeitsfahrt im nicht segelnden Fahrzustand. Es sind auch weitere Betriebsmodi von dem erfindungsgemäßen Verfahren erfassbar.A second operating mode is z. B. the activated sail function with engine running at low speeds. As part of a third operating mode, the vehicle is in a sailing condition without engine running. It is also possible that the vehicle is in the sailing mode in the third operating mode with engine running. Finally, the vehicle is in the fourth operating mode z. B. at high speed in non-sailing driving condition. Other operating modes can also be detected by the method according to the invention.

Nachfolgend wird die vorliegende Erfindung anhand der Zeichnungen weiter erläutert. Es zeigen:

Figur 1
eine schematische Ansicht eines Hydraulikmittelversorgungssystems eines Automatikgetriebes eines Fahrzeuges; und
Figur 2
eine schematische Ansicht eines möglichen Ablaufschemas des erfindungsgemäßen Verfahrens zum Ansteuern des Hydraulikmittelversorgungssystems.
Hereinafter, the present invention will be further explained with reference to the drawings. Show it:
FIG. 1
a schematic view of a hydraulic fluid supply system of an automatic transmission of a vehicle; and
FIG. 2
a schematic view of a possible flowchart of the inventive method for driving the hydraulic fluid supply system.

In Figur 1 ist schematisch ein Hydraulikmittelversorgungssystem für ein Automatikgetriebe, insbesondere ein Doppelkupplungsgetriebe, eines Fahrzeuges beispielhaft dargestellt. Das Hydraulikmittelversorgungssystem umfasst einen Hydraulikmittelkreislauf, der zum Kühlen und Betätigen sowie Schmieren von Getriebeelementen des Automatikgetriebes vorgesehen ist. Der Hydraulikmittelkreislauf wird über eine antriebsseitig angetriebene Hydraulikpumpe FZP-Pu und eine radsatzseitige angetriebene Hydraulikpumpe RS-Pu mit Hydraulikmittel bzw. Öl versorgt. Der Hydraulikmittelkreislauf ist mit einem Rücklauf zum Ölkühler und zum Hydraulikmittelsumpf verbunden. In dem Hydraulikmittelversorgungssystem ist zudem ein Kühlventil angeordnet, mit dem die Volumenströme regelbar sind. Das Kühlventil wird über einen elektrischen Drucksteller EDS angesteuert. Dies hat den Vorteil, dass der Hydraulikmittel- bzw. Kühlölvolumenstrom bedarfs- und wirkungsgradoptimiert erzeugt und verteilt werden kann. In der Ansteuerung kann auch ein Kennfeld mit entsprechenden Modellen bzw. eine Matrix mit verschiedenen Betriebsmodi hinterlegt werden. Es werden ständig der zufließende bzw. notwendige und abfließende Volumenstrom ermittelt und daraus kann die Volumenstromerzeugung bzw. Volumenstromverteilung durch die vorgegebenen Betriebsmodi variiert werden. Zusätzlich sind die Betriebsmodi aufgrund der eingehenden Parameter in Bezug auf die Volumenstromerzeugung und -verteilung variabel. Dies bedeutet, dass zum Beispiel bei einem starken Getriebeöltemperaturanstieg der Volumenstrom in dem momentan vorgegebenen Betriebsmodus temperaturabhängig verändert werden kann und somit der Gesamtvolumenstrom zur Reduzierung der Getriebeöltemperatur erhöht wird.In FIG. 1 schematically a hydraulic fluid supply system for an automatic transmission, in particular a dual-clutch transmission, a vehicle exemplified. The hydraulic fluid supply system comprises a hydraulic fluid circuit which is provided for cooling and actuating and lubricating transmission elements of the automatic transmission. The hydraulic fluid circuit is supplied via a drive-side driven hydraulic pump FZP-Pu and a wheel set side driven hydraulic pump RS-Pu with hydraulic fluid or oil. The hydraulic fluid circuit is connected to a return to the oil cooler and hydraulic sump. In the hydraulic medium supply system, a cooling valve is also arranged, with which the flow rates can be regulated. The cooling valve is controlled by an electric pressure actuator EDS. This has the advantage that the hydraulic fluid or cooling oil volume flow can be generated and distributed optimally in terms of demand and efficiency. In the control, a map with corresponding models or a matrix with different operating modes can be stored. There are constantly the inflowing or necessary and outflowing volume flow determined and from this, the volume flow generation or volume flow distribution can be varied by the predetermined operating modes. In addition, the operating modes are variable due to the incoming parameters related to volumetric flow generation and distribution. This means that, for example, in the case of a strong transmission oil temperature rise, the volume flow in the currently preset operating mode can be changed as a function of temperature and thus the total volume flow for reducing the transmission oil temperature is increased.

Über die elektronische Getriebesteuerung EGS werden verschiedene Fahrzeugparameter erfasst und ausgewertet. Aufgrund der ausgewerteten Fahrzeugparameter wird ein entsprechender Betriebsmodus BM1, BM2, BM3, BM4, BM5, ... ermittelt. Im Rahmen des beispielhaft dargestellten Ablaufdiagrammes wird als erster Betriebsmodus BM1 der Fahrzustand im nicht segelnden Zustand erkannt, wobei alternativ auch als erster Betriebsmodus BM1 der Zustand erfasst wird, bei dem sich das Fahrzeug bei langsamer Fahrt mit zusätzlicher Motorstartanforderung im segelnden Fahrzustand befindet. Als möglicher zweiter Betriebsmodus BM2 kann der Fahrzustand erfasst werden, bei dem sich das Fahrzeug unter Motorlauf bei langsamer Fahrt im segelnden Fahrzustand befindet. Als dritter Betriebsmodus BM3 kann der Fahrzustand erfasst werden, bei dem sich das Fahrzeug ohne Motorlauf im segelnden Fahrzustand befindet. Alternativ kann bei dem dritten Betriebsmodus BM3 auch der Zustand erfasst werden, bei dem sich das Fahrzeug mit Motorlauf im segelnden Fahrzustand befindet. Im Rahmen des vierten Betriebsmodus BM4 kann der Zustand erfasst werden, bei dem sich das Fahrzeug mit Hochgeschwindigkeitsfahrt im nicht segelnden Zustand befindet. Schließlich sind weitere Betriebsmodi BM5 usw. ebenfalls von dem Verfahren erfassbar.Different vehicle parameters are recorded and evaluated via the electronic transmission control EGS. On the basis of the evaluated vehicle parameters, a corresponding operating mode BM1, BM2, BM3, BM4, BM5,... Is determined. In the context of the flowchart shown by way of example, the driving state in the non-sailing state is detected as the first operating mode BM1, wherein alternatively the first operating mode BM1 is the state in which the vehicle is at low speeds with additional engine start request in the sailing driving state. As a possible second operating mode BM2, the driving state can be detected, in which the vehicle is under engine running at low speeds in the sailing mode. As the third operating mode BM3, the driving condition can be detected, in which the vehicle is in a sailing driving condition without engine running. Alternatively, in the third operating mode BM3, it is also possible to detect the condition in which the vehicle is in a sailing condition with engine running. In the fourth operating mode BM4, the state in which the vehicle is in non-sailing state with high-speed travel can be detected. Finally, other operating modes BM5 etc. are also detectable by the method.

Dem jeweiligen Betriebsmodus BM1, BM2, BM3, BM4 sind entsprechende Ansteuerungsmodelle für das Kühlventil zugeordnet, wobei die entsprechende Ansteuerung über den elektrischen Drucksteller EDS erfolgt. Auf diese Weise werden entsprechende Schaltpositionen bei dem Kühlventil eingestellt, so dass die Hydraulikmittelversorgung zum Beispiel für die Versorgung der Doppelkupplung DWC, für die Radsatzkühlung und -schmierung oder dergleichen gewährleistet ist, wobei überschüssiges Hydraulikmittel dem Rücklauf, also dem Kühler bzw. dem Sumpf zugeordnet wird.The respective operating modes BM1, BM2, BM3, BM4 are assigned corresponding control models for the cooling valve, wherein the corresponding control takes place via the electric pressure regulator EDS. In this way, corresponding switching positions are set in the cooling valve, so that the hydraulic medium supply is ensured, for example, for the supply of the double clutch DWC, for Radsatzkühlung and lubrication or the like, with excess Hydraulic means the return, so the cooler or the sump is assigned.

Zur Hydraulikmittelversorgung des Hydraulikmittelversorgungssystems sind sowohl eine motorseitig angetriebene Hydraulikpumpe bzw. Flügelzellenpumpe FZP-Pu und eine radsatzseitig angetriebene Hydraulikpumpe RS-Pu zugeordnet.For the hydraulic fluid supply of the hydraulic fluid supply system both a motor-driven hydraulic pump or vane pump FZP-Pu and a wheel set side driven hydraulic pump RS-Pu are assigned.

Als mögliche Fahrzeugparameter kann die elektronische Getriebesteuerung EGS zum Beispiel die Launch-Control, die Fahrzeuggeschwindigkeit VFZG, die Getriebeöltemperatur, das jeweilige Fahrprogramm, die Fahrzeug-Längsbeschleunigung a_laengs, das Motormoment, Sonderfahrsituationen, wie z. B. Start-Stopp-Betrieb und erhöhter Schlupfbetrieb, oder dergleichen erfassen.As a possible vehicle parameters, the electronic transmission control EGS, for example, the launch control, the vehicle speed V FZG , the transmission oil temperature, the respective driving program, the longitudinal vehicle acceleration a_laengs, the engine torque, special driving situations such. B. start-stop operation and increased slip mode, or the like.

In Figur 2 ist ein entsprechendes Ablaufdiagramm des vorgeschlagenen Verfahrens bzw. der vorgeschlagenen Verfahrensweise beispielhaft dargestellt. Zunächst werden aus den erfassten Fahrzeugparametern die Bedingungen für das Vorliegen eines entsprechenden Betriebsmodus BM1, BM2, BM3, BM4 ermittelt.In FIG. 2 is a corresponding flowchart of the proposed method and the proposed procedure exemplified. First, the conditions for the existence of a corresponding operating mode BM1, BM2, BM3, BM4 are determined from the detected vehicle parameters.

Wenn die Bedingungen für den ersten Betriebsmodus BM1 erfüllt sind, wird die Radsatzkühlung überwiegend über die radsatzseitig angetriebene Hydraulikpumpe RS-Pu durchgeführt. Die Kupplungs- bzw. Doppelkupplungskühlung und die Erzeugung des Systemdruckes zum Betätigen der Schaltelemente werden mittels der motorseitig angetriebenen Hydraulikpumpe FZP-Pu durchgeführt.If the conditions for the first operating mode BM1 are met, the wheelset cooling is performed predominantly via the wheel set driven hydraulic pump RS-Pu. The clutch and double clutch cooling and the generation of the system pressure for actuating the switching elements are performed by means of the motor-side driven hydraulic pump FZP-Pu.

Wenn die Bedingungen für den zweiten Betriebsmodus BM2 erfüllt sind, wird die radsatzseitig angetriebene Hydraulikpumpe RS-Pu zur Kühlung des Radsatzes in entsprechenden Fahrsituationen, wie zum Beispiel beim so genannten Rennstart oder bei langsamer Fahrt des Fahrzeuges durch die motorseitig angetriebene Hydraulikpumpe FZP-Pu unterstützt.If the conditions for the second operating mode BM2 are met, the wheel set side driven hydraulic pump RS-Pu is supported for cooling the wheelset in appropriate driving situations, such as during the so-called race start or slow driving of the vehicle by the motor-driven hydraulic pump FZP-Pu.

Wenn die Bedingungen für den dritten Betriebsmodus BM3 erfüllt sind, kann die Radsatzpumpe bzw. die radsatzseitig angetriebene Hydraulikpumpe RS-Pu fahrsituationsabhängig, zum Beispiel bei geringerem Bedarf, zur Kupplungskühlung umgeschaltet werden. Dadurch kann die Förderleistung der Flügelzellenpumpe bzw. der motorseitig angetriebenen Hydraulikpumpe FZP-Pu auf ein Minimum reduziert werden.If the conditions for the third operating mode BM3 are met, the wheel set pump or the wheel set side driven hydraulic pump RS-Pu can be switched depending on the driving situation, for example with less need, for clutch cooling become. As a result, the delivery rate of the vane pump or the motor-side driven hydraulic pump FZP-Pu can be reduced to a minimum.

Wenn die Bedingungen für den vierten Betriebsmodus BM4 erfüllt sind, wird bei einem hohen Kühlbedarf die Ölrückführung zusätzlich zum Ölkühler über die Saugaufladung durchgeführt, welches eine Verhinderung bzw. Reduzierung der Ölverschäumung in vorteilhafter Weise zur Folge hat.When the conditions for the fourth operating mode BM4 are satisfied, the oil return is performed in addition to the oil cooler via the suction charging, which results in a prevention or reduction of the foaming of the oil advantageously with a high cooling demand.

Bezugszeichenreference numeral

EGSEGS
elektronische Getriebesteuerungelectronic transmission control
VFZG V FZG
Fahrzeuggeschwindigkeitvehicle speed
a_laengsa_laengs
Längsbeschleunigunglongitudinal acceleration
BM1BM1
erster Betriebsmodusfirst operating mode
BM2BM2
zweiter Betriebsmodussecond operating mode
BM3BM3
dritter Betriebsmodusthird operating mode
BM4BM4
vierter Betriebsmodusfourth operating mode
BM5BM5
weiterer Betriebsmodusfurther operating mode
EDSEDS
elektromagnetischer Druckstellerelectromagnetic pressure actuator
DWCDWC
DoppelkupplungDouble coupling
FZP-PuSSP Pu
motorseitig angetriebene Hydraulikpumpe bzw. Flügelzellenpumpemotor-driven hydraulic pump or vane pump
RS-PuRS-Pu
RadsatzpumpeRadsatzpumpe

Claims (5)

  1. Method for actuating a hydraulic medium supply system of an automatic transmission of a vehicle, wherein the hydraulic medium supply system is supplied with hydraulic medium at least by a hydraulic pump (FZP-Pu) which is driven on the motor side and by a hydraulic pump (RS-Pu) which is driven on the wheel set side, wherein a cooling valve of the hydraulic medium supply system for supplying hydraulic medium is actuated as a function of sensed vehicle parameters for setting an adapted power distribution at the hydraulic pumps (FZP-Pu, RS-Pu), wherein a respectively present operating mode (BM1, BM2, BM3, BM4, BM5) of the vehicle for the actuation of the cooling valve is determined as a function of sensed vehicle parameters, characterized in that when a first operating mode (BM1), in which the vehicle is in the coasting driving state during slow travel with an additional engine start request, is sensed, the cooling valve is actuated in such a way that the cooling of the wheel set is carried out predominantly by the wheel set-side hydraulic pump (RS-Pu), and in that the cooling of the clutches and the generation of a system pressure are carried out by the hydraulic pump (FZP-Pu) which is driven on the motor side.
  2. Method according to the preamble of Claim 1 or according to Claim 1, characterized in that when a second operating mode (BM2), in which the vehicle is in the sailing driving state with the engine running during slow travel, is sensed, the cooling valve is actuated in such a way that the hydraulic pump (RS-Pu) which is driven on the wheel set side is assisted by the hydraulic pump (FZP-Pu) which is driven on the motor side for cooling the wheel set.
  3. Method according to the preamble of Claim 1 or according to Claim 1 or 2, characterized in that when a third operating mode (BM3), in which the vehicle is in the coasting driving state without the engine running, is sensed, the cooling valve is actuated in such a way that the cooling of the wheel set is carried out by the hydraulic pump (RS-Pu) which is driven on the wheel set side, wherein the hydraulic pump (RS-Pu) which is driven on the wheel set side is additionally switched over to cooling of the clutch as a function of the driving situation when the demand for cooling of the wheel set is low, and wherein the delivery volume of the hydraulic pump (FZP-Pu) which is driven on the motor side is reduced to a minimum.
  4. Method according to the preamble of Claim 1 or according to Claim 1 or 2, characterized in that when a third operating mode (BM3), in which the vehicle is in the coasting driving state with the engine running, is sensed, the cooling valve is actuated in such a way that the cooling of the wheel set is carried out by the hydraulic pump (RS-Pu) which is driven on the wheel set side, wherein the hydraulic pump (RS-Pu) which is driven on the wheel set side is additionally switched over to cooling of the clutch as a function of the driving situation when the demand for cooling of the wheel set is low, and wherein the delivery volume of the hydraulic pump (FZP-Pu) which is driven on the motor side is reduced to a minimum.
  5. Method according to the preamble of Claim 1 or according to one of Claims 1 to 4, characterized in that when the fourth operating mode (BM4), in which the vehicle is in the non-coasting driving state and traveling at high speed, is sensed, the cooling valve is actuated in such a way that when there is a high demand for hydraulic medium the supply of hydraulic medium to the oil cooler is directed via the suction charging system.
EP15702796.2A 2014-03-06 2015-02-06 Method for controlling a hydraulic-medium supply system of an automatic transmission Active EP3114371B1 (en)

Applications Claiming Priority (2)

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DE102014204072.8A DE102014204072A1 (en) 2014-03-06 2014-03-06 Method for controlling a hydraulic fluid supply system of an automatic transmission
PCT/EP2015/052478 WO2015132035A1 (en) 2014-03-06 2015-02-06 Method for controlling a hydraulic-medium supply system of an automatic transmission

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EP3114371A1 EP3114371A1 (en) 2017-01-11
EP3114371B1 true EP3114371B1 (en) 2017-12-20

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EP (1) EP3114371B1 (en)
CN (1) CN106062427B (en)
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CN108087544A (en) * 2016-11-22 2018-05-29 上海汽车集团股份有限公司 Double-clutch speed changer hydraulic control system and control method
US20240100754A1 (en) 2020-10-09 2024-03-28 Synventive Molding Solutions, Inc. Spring Cushioned Valve Pin
EP4221953A1 (en) 2020-12-08 2023-08-09 Synventive Molding Solutions, Inc. Injection molding apparatus with cooled integrated actuator electronic drive

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EP1334287B1 (en) * 2000-11-17 2008-04-23 ZF Sachs AG Clutch system
US6685437B2 (en) * 2001-09-21 2004-02-03 Borgwarner, Inc. Hydraulic transmission pump assembly having a differential actuation and integrated line pressure control
DE102005013137A1 (en) * 2005-03-22 2006-09-28 Zf Friedrichshafen Ag Method and device for controlling an oil supply for an automatic transmission and a starting element
KR100916772B1 (en) * 2007-07-18 2009-09-14 현대자동차주식회사 Hydraulic control system of automatic transmission for vehicle
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DE102014204067A1 (en) * 2014-03-06 2015-09-10 Zf Friedrichshafen Ag Method for controlling a hydraulic fluid supply system of an automatic transmission

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US20170074332A1 (en) 2017-03-16
US10006504B2 (en) 2018-06-26
CN106062427A (en) 2016-10-26
DE102014204072A1 (en) 2015-09-10
EP3114371A1 (en) 2017-01-11
WO2015132035A1 (en) 2015-09-11

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